Data / Rankings / Uninsured rate, ages 35 to 64 (US, ACS) / Counties in Maryland

Counties in Maryland by uninsured rate, ages 35 to 64 (US, ACS)

Prince George's County had the highest uninsured rate, ages 35 to 64 (US, ACS) of 24 counties in 2023, at 13.2%. Carroll County had the lowest, at 3.7%. The median was 6.1% and the figure for Maryland was 7.4%. Source: the U.S. Census Bureau.

Keep it in a collection in your library.
Highest13.2Prince George's County
Lowest3.7Carroll County
Median6.124 counties
Maryland7.4History

Map of counties, 2023

Allegany County: 5.1 %Anne Arundel County: 5.3 %Baltimore County: 6.3 %Calvert County: 3.8 %Caroline County: 8.2 %Carroll County: 3.7 %Cecil County: 4.3 %Charles County: 4.3 %Dorchester County: 7.7 %Frederick County: 6.1 %Garrett County: 7.7 %Harford County: 4.1 %Howard County: 4.5 %Kent County: 6 %Montgomery County: 8.4 %Prince George's County: 13.2 %Queen Anne's County: 6.1 %St. Mary's County: 4.3 %Somerset County: 4.1 %Talbot County: 6.4 %Washington County: 7.5 %Wicomico County: 8 %Worcester County: 7.3 %Baltimore city: 7.4 %
  • Under 4.3
  • 4.3 to 5.5
  • 5.5 to 6.4
  • 6.4 to 7.7
  • 7.7 and over
%, 2023. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2023

Prince George's County: 13.2 %Prince George's County13.2Montgomery County: 8.4 %Montgomery County8.4Caroline County: 8.2 %Caroline County8.2Wicomico County: 8 %Wicomico County8Garrett County: 7.7 %Garrett County7.7Dorchester County: 7.7 %Dorchester County7.7Washington County: 7.5 %Washington County7.5Baltimore city: 7.4 %Baltimore city7.4Worcester County: 7.3 %Worcester County7.3Talbot County: 6.4 %Talbot County6.4Baltimore County: 6.3 %Baltimore County6.3Queen Anne's County: 6.1 %Queen Anne's County6.1Frederick County: 6.1 %Frederick County6.1Kent County: 6 %Kent County6Anne Arundel County: 5.3 %Anne Arundel County5.3Allegany County: 5.1 %Allegany County5.1Howard County: 4.5 %Howard County4.5Cecil County: 4.3 %Cecil County4.3St. Mary's County: 4.3 %St. Mary's County4.3Charles County: 4.3 %Charles County4.3Harford County: 4.1 %Harford County4.1Somerset County: 4.1 %Somerset County4.1Calvert County: 3.8 %Calvert County3.8Carroll County: 3.7 %Carroll County3.7Prince George's County: 13.2 %Prince George's County13.2Montgomery County: 8.4 %Montgomery County8.4Caroline County: 8.2 %Caroline County8.2Wicomico County: 8 %Wicomico County8Garrett County: 7.7 %Garrett County7.7Dorchester County: 7.7 %Dorchester County7.7Washington County: 7.5 %Washington County7.5Baltimore city: 7.4 %Baltimore city7.4Worcester County: 7.3 %Worcester County7.3Talbot County: 6.4 %Talbot County6.4Baltimore County: 6.3 %Baltimore County6.3Queen Anne's County: 6.1 %Queen Anne's County6.1Frederick County: 6.1 %Frederick County6.1Kent County: 6 %Kent County6Anne Arundel County: 5.3 %Anne Arundel County5.3Allegany County: 5.1 %Allegany County5.1Howard County: 4.5 %Howard County4.5Cecil County: 4.3 %Cecil County4.3St. Mary's County: 4.3 %St. Mary's County4.3Charles County: 4.3 %Charles County4.3Harford County: 4.1 %Harford County4.1Somerset County: 4.1 %Somerset County4.1Calvert County: 3.8 %Calvert County3.8Carroll County: 3.7 %Carroll County3.7
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2023 (%)Change on 2022
1Prince George's County13.2+0.7 pts
2Montgomery County8.4-0 pts
3Caroline County8.2-0.1 pts
4Wicomico County8+0.8 pts
5Garrett County7.7+0.6 pts
6Dorchester County7.7+1.9 pts
7Washington County7.5+0.9 pts
8Baltimore city7.4+0.3 pts
9Worcester County7.3-0.3 pts
10Talbot County6.4+0.3 pts
11Baltimore County6.3+0.4 pts
12Queen Anne's County6.1+0.4 pts
13Frederick County6.1-0.1 pts
14Kent County6+1.4 pts
15Anne Arundel County5.3+0.4 pts
16Allegany County5.1+0.8 pts
17Howard County4.5+0.3 pts
18Cecil County4.3-0.2 pts
18St. Mary's County4.3-0.2 pts
20Charles County4.3+0.8 pts
21Harford County4.1+0.3 pts
21Somerset County4.1-0.1 pts
23Calvert County3.8-0 pts
24Carroll County3.70 pts

Other periods

About this ranking

People aged 35 to 64 without health insurance coverage of any kind, as a percentage of the civilian noninstitutionalized population aged 35 to 64. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

Coverage is what people reported at the interview, so the five-year figure averages five years of answers. People whose only coverage is the Indian Health Service count as uninsured. Active-duty military and people living in institutions are outside the universe. For single-year model-based county figures under 65, see uninsured_rate_under_65, uninsured_rate_18_64 and uninsured_rate_under_19 (SAHIE), a different source.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b27010.dat. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

U.S. Census Bureau. (2026). American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs (Counties in Maryland by uninsured rate, ages 35 to 64 (US, ACS), 2023) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b27010.dat

MLA 9

American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs, Counties in Maryland by uninsured rate, ages 35 to 64 (US, ACS), 2023. U.S. Census Bureau, 29 Jan. 2026, https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b27010.dat. Invokely, https://invokely.ai/rankings/uninsured-rate-ages-35-64/maryland-counties?period=2023. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs. Counties in Maryland by uninsured rate, ages 35 to 64 (US, ACS), 2023. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b27010.dat. Also distributed by Invokely, https://invokely.ai/rankings/uninsured-rate-ages-35-64/maryland-counties?period=2023.

Harvard

U.S. Census Bureau (2026) American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs, Counties in Maryland by uninsured rate, ages 35 to 64 (US, ACS), 2023 [Dataset]. Available at: https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b27010.dat, via Invokely: https://invokely.ai/rankings/uninsured-rate-ages-35-64/maryland-counties?period=2023 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_maryland_by_2023,
  author = {{U.S. Census Bureau}},
  title = {{American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs: Counties in Maryland by uninsured rate, ages 35 to 64 (US, ACS), 2023}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b27010.dat},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-35-64/maryland-counties?period=2023. Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary\_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b27010.dat. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs: Counties in Maryland by uninsured rate, ages 35 to 64 (US, ACS), 2023
PY  - 2026
DA  - 2026/01/29
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b27010.dat
L2  - https://invokely.ai/rankings/uninsured-rate-ages-35-64/maryland-counties?period=2023
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/uninsured-rate-ages-35-64/maryland-counties?period=2023.
N1  - Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b27010.dat. Retrieved 2026-10-12.
ER  -
Embed this chart

Paste this code into a web page or a blog post. The chart shows the latest figures as they are published, with the source and a link back to this page.

Sites that read oEmbed links, such as WordPress, can show the chart when you paste the link to this page.

Use this data in your AI agent

Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:

Rank Counties in Maryland by uninsured rate, ages 35 to 64 (US, ACS) using official data, and cite the source.
rank_places {"indicator":"uninsured_rate_35_64","level":"province","within":"Maryland","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=uninsured_rate_35_64&level=province&within=Maryland&limit=10

Connect Claude, ChatGPT or Cursor in one step. The trial answers 25 calls a day without an account.

Questions

Which county has the highest uninsured rate, ages 35 to 64 (US, ACS)?

Prince George's County, with 13.2% in 2023, according to the U.S. Census Bureau.

Which county has the lowest uninsured rate, ages 35 to 64 (US, ACS)?

Carroll County, with 3.7% in 2023.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, American Community Survey 5-year estimates, table B27010: people aged 35 to 64 with no health insurance coverage as a percentage of the civilian noninstitutionalized population aged 35 to 64, calculated with stored inputs. Retrieved 2026-10-12.

Uninsured rate, ages 35 to 64 (US, ACS): other rankings

Counties in Maryland: more rankings